METHOD FOR DISPOSING OF COMPLEX COMBUSTIBLE SOLID WASTE BY MEANS OF A VERTICAL MODULAR INCINERATOR

Abstract

The present invention relates to a method for disposing of complex combustible waste by means of a vertical modular incinerator which belongs to the field of solid waste calcination technology. The vertical modular incinerator has three or more sections which are stacked in a spatially offset manner, so as to enable the storage and combustion of solid waste in the incinerator, the bottom of the vertical modular incinerator is connected to a decomposition furnace by an exhaust gas and ash outlet and the vertical modular incinerator consists of an upper incinerator section, at least one middle incinerator section and a lower incinerator section.The present invention can effectively solve the problem of how to achieve a high level of applicability, a high degree of mixing of solid waste, a large contact area with oxygen-containing gases and a high degree of combustion. Figure for abstract: 1.

Description

Title of the invention: METHOD FOR DISPOSING OF COMPLEX COMBUSTIBLE SOLID WASTE BY MEANS OF A VERTICAL MODULAR INCINERATOR Technical field

[0001] The present invention relates to a method for disposing of complex combustible solid waste by means of a vertical modular incinerator, which belongs to the technology of solid waste calcination. Technological background

[0002] Incinerators that are generally used for disposing of solid waste in association with cement kilns have the disadvantage that the solid waste to be disposed of must be of a single nature, have a narrow particle size range, and burn at a low combustion temperature. The main reason is that the solid waste is static or moves as a whole in the incinerator, which causes a low degree of mixing of the solid waste and a reduced contact surface with oxygen-containing gases. For example, an integrated system for a cement kiln for waste incineration and infrared waste heat recovery disclosed by CN108317864A comprises a kiln head waste heat recovery system, a rotary kiln waste heat recovery system, a bypass airflow release system, and a waste incineration system;the kiln head waste heat recovery system comprises a grate cooler, a first dust removal device, a recovery boiler, a second dust removal device, a forced air device and a connecting pipeline; the rotary kiln waste heat recovery system comprises an air supply device, an air heating device and a connecting pipeline;the bypass airflow release system comprises a third dust removal device and connecting ducts and the waste incineration system comprises an incineration furnace, a primary air duct, a primary air preheater, a secondary air duct and a secondary air preheater. In another example, a cement raw meal decomposition system using an alternative fuel disclosed by CN114216336A comprises a cement raw meal decomposition reactor and a rotating drum type reactor mounted on the cement raw meal decomposition reactor; the rotating drum type reactor respectively communicates with a decomposition reactor on the decomposition reactor; raw cement flour and a tertiary air line and the rotating drum type reactor comprises a rotating mechanism rotatably connected with the decomposition reactor. Both of these examples have the aforementioned problems.

[0003] In this context, it is desirable to provide an incinerator solution which offers the following advantages: a high level of applicability, a high degree of mixing of the solid waste, a large contact surface with the oxygen-containing gases and a high degree of combustion. Summary of the invention

[0004] In order to overcome the above-mentioned defects of the prior art, the present invention provides a method for disposing of complex combustible waste by means of a vertical modular incinerator so as to solve the problem of the means to be implemented to obtain a high level of applicability, a high degree of mixing of the solid waste, a large contact surface with the oxygen-containing gases and a high degree of combustion.

[0005] To achieve this technical objective, the present invention adopts the following solution:

[0006] A method for disposing of complex combustible solid waste by means of a vertical modular incinerator, wherein the vertical modular incinerator has three or more sections which are stacked in a spatially offset manner, so as to enable the storage and combustion of the solid waste in the incinerator, and the bottom of the vertical modular incinerator is connected to a decomposition furnace by an exhaust gas and ash outlet; the vertical modular incinerator consists of an upper incinerator section, at least one middle incinerator section and a lower incinerator section; the upper incinerator section includes a main solid waste inlet, a large solid waste inlet, a tertiary air inlet, raw meal inlets, a multi-stage material bed and an aeration unit;the raw meal inlets and the large solid waste inlet are arranged beside the tertiary air inlet and the main solid waste inlet is arranged on the outer wall of the upper incinerator section and located at the top of the multi-stage material bed; the middle incinerator section also comprises multi-stage material beds and aeration units; the lower incinerator section comprises a multi-stage material bed, an aeration unit and an exhaust gas and ash outlet, the exhaust gas and ash outlet being directly connected to the lower side wall of the decomposition furnace, the multi-stage material beds of the upper incinerator section, the middle incinerator section and the lower incinerator section are all composed of the aeration units and the beds of; multi-stage materials being equipped with a high-pressure air blasting device connected to the aeration unit which serves to blow on the solid waste to advance it and cause it to fall onto the next stage of the multi-stage material bed or onto the multi-stage material bed of the next incinerator section.

[0007] The specific process for disposing of complex combustible solid waste is as follows:

[0008] Step 1: The main solid waste and the large waste are introduced into the upper part of the multi-stage material bed of the upper incinerator section, respectively from the main solid waste inlet and the large waste inlet;

[0009] Step 2: Tertiary air is introduced through the tertiary air inlet at the top of the upper incinerator section, so that the main solid waste and large waste are heated to be ignited and combustion oxygen is provided for the main solid waste and large waste;

[0010] Step 3: Raw meal is fed into the upper part of the multi-stage material bed of the upper incinerator section through the raw meal inlets, and since a temperature sensor is installed in the chamber of the vertical modular incinerator, the amount of raw meal feed can be controlled according to the temperature change of the chamber;

[0011] Step 4: The high-pressure air jetting device is controlled to intermittently jetting high-pressure air, so that the main solid waste and the large-sized solid waste advance under the high-pressure air intermittently jetting by the high-pressure air jetting device until they fall from the outlet end of the multi-stage material bed of the upper incinerator section onto the next level below the multi-stage material bed,

[0012] the main solid waste fully coming into contact with the oxygen-containing exhaust gas during the fall, accelerating the combustion of the main solid waste and, when the main solid waste falls onto the multi-stage material bed of the next level, the position of the main solid waste is changed, so that different parts of the main solid waste having different combustion levels are mixed, creating the conditions for the complete combustion of the main solid waste and

[0013] the large-sized solid waste, after combustion and weight loss, moving forward when intermittently pushed by high-pressure air, until it falls from the outlet end of the multi-stage material bed of the upper incinerator section onto the next level below the multi-stage material bed;

[0014] Step 5: The multi-stage material beds of the central incinerator section receive all the solid waste from the multi-stage material bed of the upper section. upper incinerator section and, since the multi-stage material beds of the central incinerator section are also provided with the high-pressure air jetting devices, all the solid waste advances when it is intermittently pushed by the high-pressure air, until all the solid waste falls from the outlet end of the multi-stage material bed of the central incinerator section onto the next level;in this process, the combustible materials of all solid wastes burn continuously and all solid wastes fully come into contact with hot exhaust gases containing oxygen during the falling process, accelerating combustion, and, when all solid wastes fall onto the next level under the multi-stage material bed, the position of all solid wastes is changed, so that different parts of all solid wastes with different combustion levels are mixed, creating conditions for the total combustion of all solid wastes; ;

[0015] Step 6: The upper part of the lower incinerator section receives all the solid wastes from the multi-stage material bed of the middle incinerator section, and since the multi-stage material beds of the lower incinerator section are also provided with the high-pressure air jetting devices, all the solid wastes advance when they are intermittently pushed by the high-pressure air, until all the solid wastes fall from the outlet end of the multi-stage material bed of the lower incinerator section into the decomposition furnace through the outlet end of the multi-stage material bed of the lower incinerator section via the exhaust gas and ash outlet, and in this process, the combustible materials contained in all the solid wastes are completely consumed and enter the decomposition furnace in the form of ash and exhaust gas.

[0016] Further, the side of the upper incinerator section, the at least one middle incinerator section and the lower incinerator section is provided with an inspection door and an ash handling port.

[0017] In addition, there are two raw meal inlets which are arranged on both sides of the tertiary air inlet, at the front and rear.

[0018] Furthermore, the raw flour inlets are round inlets while the large solid waste inlet is a rectangular inlet.

[0019] In addition, there are one or more inlets for the main solid waste depending on the width of the vertical modular incinerator.

[0020] Further, the central incinerator section is provided with a plurality of multi-stage material beds that are offset from each other.

[0021] Furthermore, the high pressure air blasting device controls the speed of the solid waste flow by means of the amount of air blasted and the frequency of projection, so as to control the storage time of solid waste.

[0022] Compared to the prior art, the present invention has the following beneficial effects:

[0023] Because the present invention adopts a vertical modular staggered stacking concept, the area occupied by the equipment is small, which is beneficial for arrangement in a preheating system; by adopting the vertical modular staggered stacking concept, because the solid waste falls from the preceding section onto the following section, the solid waste falls in a dispersed state and, therefore, fully contacts the oxygen in the exhaust gas, accelerating heat transfer and combustion; by adopting the vertical modular staggered stacking concept, when the solid waste falls onto the multi-stage material bed of the following section, the solid waste is fully mixed, improving non-uniform combustion and accelerating the combustion of the materials; by adopting the modular concept, individualization of specifications is achieved by adjusting the number of modules of the middle section;there are no rotating parts in the vertical incinerator, and the multi-stage material bed of each section is provided with a high-pressure gas source, and the flow speed of the solid waste is controlled by means of the amount of air being thrown and the frequency of throwing, so as to control the storage time of the solid waste, and since the vertical incinerator is provided with a separate inlet for large-sized solid waste, the incinerator is applicable to a wider range of solid waste particle size. ; Brief description of the figures

[0024] The present invention is described in more detail below with reference to the accompanying figures.

[0025] [Fig.l] is a schematic front view of a vertical modular incinerator according to the present invention.

[0026] [Fig.2] is a schematic top view of the incinerator shown in [Fig.l]. Description of the embodiments

[0027] Exemplary embodiments of the present invention are described in detail below with reference to Figures 1 and 2.

[0028] Example 1

[0029] A method for disposing of complex combustible solid waste using a vertical modular incinerator according to the present invention, wherein the vertical modular incinerator has three or more sections which are stacked in a spatially offset manner so as to allow for storage and combustion of the solid waste into the incinerator, and the bottom of the vertical modular incinerator is connected to a decomposition furnace 10 by an exhaust gas and ash outlet. The vertical modular incinerator consists of an upper incinerator section 7, at least one middle incinerator section 8 and a lower incinerator section 9. The upper incinerator section 7 comprises a main solid waste inlet 1, a large solid waste inlet 4, a tertiary air inlet 2, raw meal inlets 3, a multi-stage material bed 5 and an aeration unit 6. The raw meal inlets 3 and the large solid waste inlet 4 are arranged next to the tertiary air inlet 2 and the main solid waste inlets 1 are arranged on the outer wall of the upper incinerator section 7 and located at the top of the multi-stage material bed 5.In the present embodiment, there are two raw meal inlets 3 which are round inlets and are arranged on either side of the tertiary air inlet 2, at the front and rear, and the large solid waste inlet 4 is a rectangular inlet. There are two main solid waste inlets 1 which are arranged in parallel.

[0030] The central incinerator section 8 also comprises multi-stage material beds 5 and aeration units 6. The lower incinerator section 9 comprises a multi-stage material bed 5, an aeration unit 6 and an exhaust gas and ash outlet, the exhaust gas and ash outlet being directly connected to the lower side wall of the decomposition furnace 10. The multi-stage material beds 5 of the upper incinerator section 7, the central incinerator section 8 and the lower incinerator section 9 are all composed of the aeration units 6 and the multi-stage material bed 5 is equipped with a high-pressure air jetting device connected to the aeration unit 6 which serves to blow on the solid waste to advance it and make it fall onto the next stage of the multi-stage material bed 5 or onto the multi-stage material bed 5 of the next incinerator section.The high-pressure air blasting device controls the speed of the solid waste flow by means of the blasted air quantity and the blasting frequency, so as to control the storage time of the solid waste. In addition, the side of the upper incinerator section 7, the at least one central incinerator section 8 and the lower incinerator section 9 is provided with an inspection door and an ash handling port which are not shown in the accompanying figures.

[0031] The specific process for disposing of complex combustible solid waste is as follows:

[0032] Step 1: The main solid waste and the large waste are introduced into the upper part of the multi-stage material bed 5 of the upper incinerator section 7 respectively from the main solid waste inlet 1 and the entrance of large waste 4.

[0033] Step 2: Tertiary air is introduced through the tertiary air inlet 2 at the top of the upper incinerator section 7, so that the main solid waste and the large waste are heated to be ignited and combustion oxygen is provided for the main solid waste and the large waste.

[0034] Step 3: Raw meal is fed into the upper part of the multi-stage material bed 5 of the upper incinerator section 7 through the raw meal inlets 3 and, since a temperature sensor is installed in the chamber of the vertical modular incinerator, the amount of raw meal feed can be controlled according to the temperature change of the chamber.

[0035] Step 4: The high-pressure air jetting device is controlled to intermittently jetting high-pressure air, so that the main solid waste and the large-sized solid waste advance under the high-pressure air intermittently jetting by the high-pressure air jetting device until they fall from the outlet end of the multi-stage material bed 5 of the upper incinerator section 7 onto the next level below the multi-stage material bed 5.

[0036] The main solid waste fully contacts the oxygen-containing exhaust gas during the fall, accelerating the combustion of the main solid waste, and when the main solid waste falls onto the multi-stage material bed 5 of the next level, the position of the main solid waste is changed, so that different parts of the main solid waste having different combustion levels are mixed, creating the conditions for the complete combustion of the main solid waste.

[0037] The large-sized solid waste, after combustion and weight loss, advances when intermittently pushed by high-pressure air, until it falls from the outlet end of the multi-stage material bed 5 of the upper incinerator section 7 onto the next level below the multi-stage material bed 5.

[0038] Step 5: The multi-stage material beds 5 of the incinerator middle section 8 receive all the solid waste from the multi-stage material bed 5 of the upper incinerator section 7 and, since the multi-stage material beds 5 of the incinerator middle section 8 are also provided with the high-pressure air jetting devices, all the solid waste advances when intermittently pushed by the high-pressure air, until all the solid waste falls from the outlet end of the multi-stage material bed 5 of the incinerator middle section 8 onto the next level. In this process, the combustible materials of all the solid waste burn continuously and all the solid waste fully comes into contact with hot exhaust gases containing oxygen during the falling process, ac accelerating combustion. In addition, when all the solid waste falls onto the next level below the multi-stage material bed 5, the position of all the solid waste is changed, so that different parts of all the solid waste with different combustion levels are mixed, creating the conditions for the total combustion of all the solid waste.

[0039] Step 6: The upper part of the lower incinerator section 9 receives all the solid waste from the multi-stage material bed 5 of the central incinerator section 8, and since the multi-stage material beds 5 of the lower incinerator section 9 are also provided with the high-pressure air jetting devices, all the solid waste advances when intermittently pushed by the high-pressure air until all the solid waste falls from the outlet end of the multi-stage material bed 5 of the lower incinerator section 9 into the decomposition furnace 10 through the outlet end of the multi-stage material bed 5 of the lower incinerator section 9 via the exhaust gas and ash outlet, and in this process, the combustible materials contained in all the solid waste are completely consumed and enter the decomposition furnace 10 in the form of ash and exhaust gas.

[0040] Example 2

[0041] In the present example, the central incinerator section 8 is provided with two multi-stage material bed sections 5 which are offset from each other; they are not shown in the accompanying figures. The remainder of the structure and the method are the same as those of Example 1.

[0042] To summarize, although embodiments of the present invention have been described, it should be understood that the aforementioned embodiments are given by way of example and should not be construed as limiting the present invention, and those skilled in the art may make changes, modifications, substitutions, and variations to the aforementioned embodiments without departing from the principle and objectives of the present invention.

Claims

1. Claims A method for disposing of complex combustible solid waste by means of a vertical modular incinerator, wherein said vertical modular incinerator has three or more sections which are stacked in a spatially offset manner, so as to enable the storage and combustion of the solid waste in the incinerator, and the bottom of said vertical modular incinerator is connected to a decomposition furnace (10) by an exhaust gas and ash outlet; said vertical modular incinerator consists of an upper incinerator section (7), at least one middle incinerator section (8) and a lower incinerator section (9); said upper incinerator section (7) comprises a main solid waste inlet (1), a large solid waste inlet (4), a tertiary air inlet (2), raw meal inlets (3),a multi-stage material bed (5) and an aeration unit (6); the raw meal inlets (3) and the large solid waste inlet (4) are arranged next to the tertiary air inlet (2) and said main solid waste inlet (1) is arranged on the outer wall of the upper incinerator section (7) and located at the top of the multi-stage material bed (5); said middle incinerator section (8) also comprises multi-stage material beds (5) and aeration units (6); said lower incinerator section (9) comprises a multi-stage material bed (5), an aeration unit (6) and an exhaust gas and ash outlet, the exhaust gas and ash outlet being directly connected to the lower side wall of the decomposition furnace (10), the multi-stage material beds (5) of the upper incinerator section (7),of the central incinerator section (8) and the lower incinerator section (9) all being composed of the aeration units (6) and the multi-stage material beds (5) being equipped with a high-pressure air blasting device connected to the aeration unit (6) which serves to blow on the solid waste to advance it and make it fall on the next stage of the multi-stage material bed (5) or on the multi-stage material bed (5) of the next incinerator section, characterized in that the specific method for disposing of the complex combustible solid waste is as follows:, Step 1: Main solid waste and large waste are introduced into the upper part of the multi-stage material bed (5) of the upper incinerator section (7), respectively from the main solid waste inlet (1) and the large waste inlet (4); Step 2: Tertiary air is introduced through the tertiary air inlet (2) at the top of the upper incinerator section (7), so that the main solid waste and large waste are heated to be ignited and combustion oxygen is provided for the main solid waste and large waste; Step 3: Raw meal is fed into the upper part of the multi-stage material bed (5) of the upper incinerator section (7) through the raw meal inlets (3), and since a temperature sensor is installed in the chamber of the vertical modular incinerator, the amount of raw meal feed can be controlled according to the temperature change of the chamber; Step 4: The high-pressure air jetting device is controlled to intermittently jetting high-pressure air, so that the main solid waste and the large-sized solid waste advance under the high-pressure air intermittently jetting by the high-pressure air jetting device until they fall from the outlet end of the multi-stage material bed (5) of the upper incinerator section (7) onto the next level below the multi-stage material bed (5), the main solid waste fully contacting the oxygen-containing exhaust gas during the falling, accelerating the combustion of the main solid waste, and when the main solid waste falls onto the multi-stage material bed (5) of the next level, the position of the main solid waste is changed,so that different parts of the main solid wastes having different combustion levels are mixed, creating the conditions for the total combustion of the main solid wastes and the large-sized solid wastes, after combustion and weight loss, moving forward when they are intermittently pushed by the high-pressure air, until they fall from the outlet end of the multi-stage material bed (5) of the upper incinerator section (7) onto the next level below the multi-stage material bed (5);, Step 5: The multi-stage material beds (5) of the central incinerator section (8) receive all the solid waste from the material bed

2.

3. multi-stage material bed (5) of the upper incinerator section (7) and, since the multi-stage material beds (5) of the middle incinerator section (8) are also provided with the high-pressure air jetting devices, all the solid wastes advance when they are intermittently pushed by the high-pressure air, until all the solid wastes fall from the outlet end of the multi-stage material bed (5) of the middle incinerator section (8) onto the next level; in this process, the combustible materials of all the solid wastes burn continuously and all the solid wastes fully come into contact with hot exhaust gases containing oxygen during the falling process, accelerating the combustion;furthermore, when all the solid waste falls onto the next level below the multi-stage material bed (5), the position of all the solid waste is changed, so that different parts of all the solid waste having different combustion levels are mixed, creating the conditions for the total combustion of all the solid waste; Step 6: The upper part of the lower incinerator section (9) receives all the solid waste from the multi-stage material bed (5) of the middle incinerator section (8), and since the multi-stage material beds (5) of the lower incinerator section (9) are also provided with the high-pressure air jetting devices, all the solid waste advances when intermittently pushed by the high-pressure air until all the solid waste falls from the outlet end of the multi-stage material bed (5) of the lower incinerator section (9) into the decomposition furnace (10) through the outlet end of the multi-stage material bed (5) of the lower incinerator section (9) via the exhaust gas and ash outlet, and in this process,the combustible materials contained in all the solid waste are completely consumed and enter the decomposition furnace (10) in the form of ash and exhaust gas. A method for disposing of complex combustible solid waste by means of a vertical modular incinerator according to claim 1, characterized in that the side of said upper incinerator section (7), said at least one central incinerator section (8) and said lower incinerator section (9) is provided with an inspection door and an ash handling port., A method for disposing of complex combustible solid waste using a vertical modular incinerator according to claim 1, ca- characterized in that there are two raw flour inlets (3) which are arranged on both sides of the tertiary air inlet (2), at the front and at the rear.

4. A method for disposing of complex combustible solid waste by means of a vertical modular incinerator according to claim 1, characterized in that the raw meal inlets (3) are round inlets while the large solid waste inlet (4) is a rectangular inlet.

5. A method for disposing of complex combustible solid waste by means of a vertical modular incinerator according to claim 1, characterized in that there are one or more inlets for the main solid waste (1) depending on the width of the vertical modular incinerator.

6. A method for disposing of complex combustible solid waste by means of a vertical modular incinerator according to claim 1, characterized in that the central incinerator section (8) is provided with a plurality of multi-stage material beds (5) which are offset from each other.

7. A method for disposing of complex combustible solid waste by means of a vertical modular incinerator according to claim 1, characterized in that the high-pressure air projection device controls the speed of the solid waste flow by means of the quantity of air projected and the projection frequency, so as to control the storage time of the solid waste.

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